Teachers’ competence in managing the classroom becomes a significant factor in the students’ comprehension, and further, in developing their competence. This study was aimed to observe and give the evidence of the use lesson study in helping the teacher to have the other’s perspective, especially in the process of teaching to strengthen their strategies and classroom management. By applying action research through plan, do, and reflective phases, lesson study was able to foster significant teaching skill to develop the quality of teaching and learning. The average of teachers’ pedagogical competence for Language Testing Administration (LTA) was 3.33 and 2.84 for Genre Based Writing (GBW) from three cycles. The improvement of teachers’ pedagogical competence was based on their decision in adjusting the material and approach to implement a meaningful learning. It proved that students’ motivation could be optimally stimulated in joining the classroom. However, the students’ perception of teachers’ pedagogical competence was also increasing. It was believed that it was a part of teaching improvement. Therefore, it is recommended to implement lesson study for improving the quality of learning especially for its process.